Omandur Ramasamy Reddiyar was born on 1st February 1985 to Muthuram Reddiyar and Aranganayatai in Omandur, Tindivanam Taluk, Vilupuram District. He had his schooling at Walter scudder High school. He was also a farmer He married Singarathammal in the year 1910. His daughter and son died at their early age and his wife died on 1920.
He joined congress party in 1919 and became the leader of Tindivanam Congress Committee. He become the Chief Minister of Madras Presidency in 23.03.1947 He stepped down as Chief Minister in 06.04.1949. He resided in Vadalur permanently in the year 1951. He established Appar orphanage home, Ramalinga service home, Vallalar Kurutula High school and O.P.R Farm. He founded Siddhalingamadam in 01.09.1958.
He abhored from polities in 1962. He breathed his last in 25th August 1970 Diligence Honesty,Thrift, Austeristy, discipline, Interest in Agriculture, Self-fulfillment, Marathy Prompthers in justice were his goals.
The Hon’ble Chief Minister of Tamil Nadu Selvi J Jayalalithaa inaugurated Former Chief Minister of Omanthur Ramasamy Reddiyar Manimandapam built at Omanthur, Villupuram District at a cost of Rs.69.00 lakhs,on 20.02.2013.